No real changes, just use clearer names for wxMSW wxToolTip methods.

Rename wxToolTip::DoAddOtherWindow() to DoAddHWND() as it should be used for
adding any window associated with the tooltip, either the main or an auxiliary
one. And rename wxToolTip::Add() to AddOtherWindow() because it shouldn't be
used for the main window.

See #14184.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71096 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/spinctrl.cpp

@@ -604,7 +604,7 @@ void wxSpinCtrl::DoSetToolTip(wxToolTip *tip)
     wxSpinButton::DoSetToolTip(tip);
 
     if ( tip )
-        tip->Add(m_hwndBuddy);
+        tip->AddOtherWindow(m_hwndBuddy);
 }
 
 #endif // wxUSE_TOOLTIPS